Add qr/\b{gcb}/

A function implements seeing if the space between any two characters is
a grapheme cluster break.  Afer I wrote this, I realized that an array
lookup might be a better implementation, but the deadline for v5.22 was
too close to change it.  I did see that my gcc optimized it down to
an array lookup.

This makes the implementation of \X go from being complicated to
trivial.

1 files changed, 5 insertions, 0 deletions

diff --git a/regcomp.h b/regcomp.h
index c17bf62d42..ee9be7a505 100644
--- a/regcomp.h
+++ b/regcomp.h
@@ -993,6 +993,11 @@ re.pm, especially to the documentation.
 
 #endif /* DEBUG RELATED DEFINES */
 
+typedef enum {
+	TRADITIONAL_BOUND = _CC_WORDCHAR,
+	GCB_BOUND
+} bound_type;
+
 /*
  * Local variables:
  * c-indentation-style: bsd